usb: remove msos-descriptor feature.

Fix typo in embassy-net docs

embassy-executor/CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.3.2 - 2023-11-06
+
+- Use `atomic-polyfill` for `riscv32`
+- Removed unused dependencies (static_cell, futures-util)
+
 ## 0.3.1 - 2023-11-01
 
 - Fix spurious "Found waker not created by the Embassy executor" error in recent nightlies.

embassy-executor/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "embassy-executor"
-version = "0.3.1"
+version = "0.3.2"
 edition = "2021"
 license = "MIT OR Apache-2.0"
 description = "async/await executor designed for embedded usage"
@@ -57,7 +57,6 @@ defmt = { version = "0.3", optional = true }
 log = { version = "0.4.14", optional = true }
 rtos-trace = { version = "0.1.2", optional = true }
 
-futures-util = { version = "0.3.17", default-features = false }
 embassy-macros = { version = "0.2.1", path = "../embassy-macros" }
 embassy-time = { version = "0.1.5", path = "../embassy-time", optional = true}
 atomic-polyfill = "1.0.1"

embassy-executor/src/arch/riscv32.rs

@@ -6,8 +6,8 @@ pub use thread::*;
 #[cfg(feature = "executor-thread")]
 mod thread {
     use core::marker::PhantomData;
-    use core::sync::atomic::{AtomicBool, Ordering};
 
+    use atomic_polyfill::{AtomicBool, Ordering};
     #[cfg(feature = "nightly")]
     pub use embassy_macros::main_riscv as main;
 

embassy-net-esp-hosted/Cargo.toml

@@ -15,7 +15,7 @@ embassy-net-driver-channel = { version = "0.2.0", path = "../embassy-net-driver-
 embedded-hal = { version = "1.0.0-rc.1" }
 embedded-hal-async = { version = "=1.0.0-rc.1" }
 
-noproto = { git="https://github.com/embassy-rs/noproto", default-features = false, features = ["derive"] }
+noproto = { git="https://github.com/embassy-rs/noproto", rev = "c90f3a78d7b5642415e0a07af401320b84d8ab6f", default-features = false, features = ["derive"] }
 #noproto = { version = "0.1", path = "/home/dirbaio/noproto", default-features = false, features = ["derive"] }
 heapless = "0.7.16"
 

embassy-net/CHANGELOG.md

@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+- Avoid never resolving `TcpIo::read` when the output buffer is empty.
+
 ## 0.2.1 - 2023-10-31
 
 - Re-add impl_trait_projections

embassy-net/README.md

@@ -4,7 +4,7 @@
 
 It builds on [`smoltcp`](https://github.com/smoltcp-rs/smoltcp). It provides a higher-level and more opinionated
 API. It glues together the components provided by `smoltcp`, handling the low-level details with defaults and
-memory management designed to work well for embedded systems, aiiming for a more "Just Works" experience.
+memory management designed to work well for embedded systems, aiming for a more "Just Works" experience.
 
 ## Features
 

embassy-net/src/tcp.rs

@@ -390,6 +390,13 @@ impl<'d> TcpIo<'d> {
             // CAUTION: smoltcp semantics around EOF are different to what you'd expect
             // from posix-like IO, so we have to tweak things here.
             self.with_mut(|s, _| match s.recv_slice(buf) {
+                // Reading into empty buffer
+                Ok(0) if buf.is_empty() => {
+                    // embedded_io_async::Read's contract is to not block if buf is empty. While
+                    // this function is not a direct implementor of the trait method, we still don't
+                    // want our future to never resolve.
+                    Poll::Ready(Ok(0))
+                }
                 // No data ready
                 Ok(0) => {
                     s.register_recv_waker(cx.waker());

embassy-stm32/src/eth/v2/descriptors.rs

@@ -119,13 +119,11 @@ impl<'a> TDesRing<'a> {
         // "Preceding reads and writes cannot be moved past subsequent writes."
         fence(Ordering::Release);
 
-        self.index = self.index + 1;
-        if self.index == self.descriptors.len() {
-            self.index = 0;
-        }
-
         // signal DMA it can try again.
-        ETH.ethernet_dma().dmactx_dtpr().write(|w| w.0 = 0)
+        // See issue #2129
+        ETH.ethernet_dma().dmactx_dtpr().write(|w| w.0 = &td as *const _ as u32);
+
+        self.index = (self.index + 1) % self.descriptors.len();
     }
 }
 
@@ -237,21 +235,19 @@ impl<'a> RDesRing<'a> {
 
     /// Pop the packet previously returned by `available`.
     pub(crate) fn pop_packet(&mut self) {
-        let descriptor = &mut self.descriptors[self.index];
-        assert!(descriptor.available());
+        let rd = &mut self.descriptors[self.index];
+        assert!(rd.available());
 
-        self.descriptors[self.index].set_ready(self.buffers[self.index].0.as_mut_ptr());
+        rd.set_ready(self.buffers[self.index].0.as_mut_ptr());
 
         // "Preceding reads and writes cannot be moved past subsequent writes."
         fence(Ordering::Release);
 
         // signal DMA it can try again.
-        ETH.ethernet_dma().dmacrx_dtpr().write(|w| w.0 = 0);
+        // See issue #2129
+        ETH.ethernet_dma().dmacrx_dtpr().write(|w| w.0 = &rd as *const _ as u32);
 
         // Increment index.
-        self.index += 1;
-        if self.index == self.descriptors.len() {
-            self.index = 0
-        }
+        self.index = (self.index + 1) % self.descriptors.len();
     }
 }

embassy-stm32/src/rcc/f4f7.rs

@@ -1,8 +1,9 @@
+use crate::pac::pwr::vals::Vos;
 pub use crate::pac::rcc::vals::{
     Hpre as AHBPrescaler, Pllm as PllPreDiv, Plln as PllMul, Pllp, Pllq, Pllr, Pllsrc as PllSource,
     Ppre as APBPrescaler, Sw as Sysclk,
 };
-use crate::pac::{FLASH, RCC};
+use crate::pac::{FLASH, PWR, RCC};
 use crate::rcc::{set_freqs, Clocks};
 use crate::time::Hertz;
 
@@ -100,12 +101,17 @@ impl Default for Config {
 }
 
 pub(crate) unsafe fn init(config: Config) {
+    // set VOS to SCALE1, if use PLL
+    // TODO: check real clock speed before set VOS
+    if config.pll.is_some() {
+        PWR.cr1().modify(|w| w.set_vos(Vos::SCALE1));
+    }
+
     // always enable overdrive for now. Make it configurable in the future.
     #[cfg(not(any(
         stm32f401, stm32f410, stm32f411, stm32f412, stm32f413, stm32f423, stm32f405, stm32f407, stm32f415, stm32f417
     )))]
     {
-        use crate::pac::PWR;
         PWR.cr1().modify(|w| w.set_oden(true));
         while !PWR.csr1().read().odrdy() {}
 
@@ -113,14 +119,6 @@ pub(crate) unsafe fn init(config: Config) {
         while !PWR.csr1().read().odswrdy() {}
     }
 
-    #[cfg(any(stm32f401, stm32f410, stm32f411, stm32f412, stm32f413, stm32f423))]
-    {
-        use crate::pac::pwr::vals::Vos;
-        use crate::pac::PWR;
-
-        PWR.cr1().modify(|w| w.set_vos(Vos::SCALE1));
-    }
-
     // Configure HSI
     let hsi = match config.hsi {
         false => {

embassy-usb-logger/src/lib.rs

@@ -19,6 +19,7 @@ pub struct LoggerState<'d> {
     device_descriptor: [u8; 32],
     config_descriptor: [u8; 128],
     bos_descriptor: [u8; 16],
+    msos_descriptor: [u8; 256],
     control_buf: [u8; 64],
 }
 
@@ -30,6 +31,7 @@ impl<'d> LoggerState<'d> {
             device_descriptor: [0; 32],
             config_descriptor: [0; 128],
             bos_descriptor: [0; 16],
+            msos_descriptor: [0; 256],
             control_buf: [0; 64],
         }
     }
@@ -73,6 +75,7 @@ impl<const N: usize> UsbLogger<N> {
             &mut state.device_descriptor,
             &mut state.config_descriptor,
             &mut state.bos_descriptor,
+            &mut state.msos_descriptor,
             &mut state.control_buf,
         );
 

embassy-usb/Cargo.toml

@@ -13,7 +13,6 @@ target = "thumbv7em-none-eabi"
 [features]
 defmt = ["dep:defmt", "embassy-usb-driver/defmt"]
 usbd-hid = ["dep:usbd-hid", "dep:ssmarshal"]
-msos-descriptor = []
 default = ["usbd-hid"]
 
 # BEGIN AUTOGENERATED CONFIG FEATURES

embassy-usb/src/builder.rs

@@ -3,7 +3,6 @@ use heapless::Vec;
 use crate::config::MAX_HANDLER_COUNT;
 use crate::descriptor::{BosWriter, DescriptorWriter};
 use crate::driver::{Driver, Endpoint, EndpointType};
-#[cfg(feature = "msos-descriptor")]
 use crate::msos::{DeviceLevelDescriptor, FunctionLevelDescriptor, MsOsDescriptorWriter};
 use crate::types::{InterfaceNumber, StringIndex};
 use crate::{Handler, Interface, UsbDevice, MAX_INTERFACE_COUNT, STRING_INDEX_CUSTOM_START};
@@ -133,7 +132,6 @@ pub struct Builder<'d, D: Driver<'d>> {
     config_descriptor: DescriptorWriter<'d>,
     bos_descriptor: BosWriter<'d>,
 
-    #[cfg(feature = "msos-descriptor")]
     msos_descriptor: MsOsDescriptorWriter<'d>,
 }
 
@@ -149,7 +147,7 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
         device_descriptor_buf: &'d mut [u8],
         config_descriptor_buf: &'d mut [u8],
         bos_descriptor_buf: &'d mut [u8],
-        #[cfg(feature = "msos-descriptor")] msos_descriptor_buf: &'d mut [u8],
+        msos_descriptor_buf: &'d mut [u8],
         control_buf: &'d mut [u8],
     ) -> Self {
         // Magic values specified in USB-IF ECN on IADs.
@@ -189,14 +187,12 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
             config_descriptor,
             bos_descriptor,
 
-            #[cfg(feature = "msos-descriptor")]
             msos_descriptor: MsOsDescriptorWriter::new(msos_descriptor_buf),
         }
     }
 
     /// Creates the [`UsbDevice`] instance with the configuration in this builder.
     pub fn build(mut self) -> UsbDevice<'d, D> {
-        #[cfg(feature = "msos-descriptor")]
         let msos_descriptor = self.msos_descriptor.build(&mut self.bos_descriptor);
 
         self.config_descriptor.end_configuration();
@@ -206,7 +202,6 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
         info!("USB: device_descriptor used: {}", self.device_descriptor.position());
         info!("USB: config_descriptor used: {}", self.config_descriptor.position());
         info!("USB: bos_descriptor used: {}", self.bos_descriptor.writer.position());
-        #[cfg(feature = "msos-descriptor")]
         info!("USB: msos_descriptor used: {}", msos_descriptor.len());
         info!("USB: control_buf size: {}", self.control_buf.len());
 
@@ -217,10 +212,9 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
             self.device_descriptor.into_buf(),
             self.config_descriptor.into_buf(),
             self.bos_descriptor.writer.into_buf(),
+            msos_descriptor,
             self.interfaces,
             self.control_buf,
-            #[cfg(feature = "msos-descriptor")]
-            msos_descriptor,
         )
     }
 
@@ -251,7 +245,6 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
             builder: self,
             iface_count_index,
 
-            #[cfg(feature = "msos-descriptor")]
             first_interface,
         }
     }
@@ -275,7 +268,6 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
         StringIndex::new(index)
     }
 
-    #[cfg(feature = "msos-descriptor")]
     /// Add an MS OS 2.0 Descriptor Set.
     ///
     /// Panics if called more than once.
@@ -283,13 +275,11 @@ impl<'d, D: Driver<'d>> Builder<'d, D> {
         self.msos_descriptor.header(windows_version, vendor_code);
     }
 
-    #[cfg(feature = "msos-descriptor")]
     /// Add an MS OS 2.0 Device Level Feature Descriptor.
     pub fn msos_feature<T: DeviceLevelDescriptor>(&mut self, desc: T) {
         self.msos_descriptor.device_feature(desc);
     }
 
-    #[cfg(feature = "msos-descriptor")]
     /// Gets the underlying [`MsOsDescriptorWriter`] to allow adding subsets and features for classes that
     /// do not add their own.
     pub fn msos_writer(&mut self) -> &mut MsOsDescriptorWriter<'d> {
@@ -306,13 +296,11 @@ pub struct FunctionBuilder<'a, 'd, D: Driver<'d>> {
     builder: &'a mut Builder<'d, D>,
     iface_count_index: Option<usize>,
 
-    #[cfg(feature = "msos-descriptor")]
     first_interface: InterfaceNumber,
 }
 
 impl<'a, 'd, D: Driver<'d>> Drop for FunctionBuilder<'a, 'd, D> {
     fn drop(&mut self) {
-        #[cfg(feature = "msos-descriptor")]
         self.builder.msos_descriptor.end_function();
     }
 }
@@ -344,7 +332,6 @@ impl<'a, 'd, D: Driver<'d>> FunctionBuilder<'a, 'd, D> {
         }
     }
 
-    #[cfg(feature = "msos-descriptor")]
     /// Add an MS OS 2.0 Function Level Feature Descriptor.
     pub fn msos_feature<T: FunctionLevelDescriptor>(&mut self, desc: T) {
         if !self.builder.msos_descriptor.is_in_config_subset() {
@@ -355,7 +342,6 @@ impl<'a, 'd, D: Driver<'d>> FunctionBuilder<'a, 'd, D> {
             self.builder.msos_descriptor.function(self.first_interface);
         }
 
-        #[cfg(feature = "msos-descriptor")]
         self.builder.msos_descriptor.function_feature(desc);
     }
 }

embassy-usb/src/lib.rs

@@ -175,10 +175,7 @@ pub struct UsbBufferReport {
     /// Number of bos descriptor bytes used
     pub bos_descriptor_used: usize,
     /// Number of msos descriptor bytes used
-    ///
-    /// Will be `None` if the "msos-descriptor" feature is not active.
-    /// Otherwise will return Some(bytes).
-    pub msos_descriptor_used: Option<usize>,
+    pub msos_descriptor_used: usize,
     /// Size of the control buffer
     pub control_buffer_size: usize,
 }
@@ -197,6 +194,7 @@ struct Inner<'d, D: Driver<'d>> {
     device_descriptor: &'d [u8],
     config_descriptor: &'d [u8],
     bos_descriptor: &'d [u8],
+    msos_descriptor: crate::msos::MsOsDescriptorSet<'d>,
 
     device_state: UsbDeviceState,
     suspended: bool,
@@ -212,9 +210,6 @@ struct Inner<'d, D: Driver<'d>> {
 
     interfaces: Vec<Interface, MAX_INTERFACE_COUNT>,
     handlers: Vec<&'d mut dyn Handler, MAX_HANDLER_COUNT>,
-
-    #[cfg(feature = "msos-descriptor")]
-    msos_descriptor: crate::msos::MsOsDescriptorSet<'d>,
 }
 
 impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
@@ -225,9 +220,9 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
         device_descriptor: &'d [u8],
         config_descriptor: &'d [u8],
         bos_descriptor: &'d [u8],
+        msos_descriptor: crate::msos::MsOsDescriptorSet<'d>,
         interfaces: Vec<Interface, MAX_INTERFACE_COUNT>,
         control_buf: &'d mut [u8],
-        #[cfg(feature = "msos-descriptor")] msos_descriptor: crate::msos::MsOsDescriptorSet<'d>,
     ) -> UsbDevice<'d, D> {
         // Start the USB bus.
         // This prevent further allocation by consuming the driver.
@@ -242,6 +237,7 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
                 device_descriptor,
                 config_descriptor,
                 bos_descriptor,
+                msos_descriptor,
 
                 device_state: UsbDeviceState::Unpowered,
                 suspended: false,
@@ -251,8 +247,6 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
                 set_address_pending: false,
                 interfaces,
                 handlers,
-                #[cfg(feature = "msos-descriptor")]
-                msos_descriptor,
             },
         }
     }
@@ -261,16 +255,11 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
     ///
     /// Useful for tuning buffer sizes for actual usage
     pub fn buffer_usage(&self) -> UsbBufferReport {
-        #[cfg(not(feature = "msos-descriptor"))]
-        let mdu = None;
-        #[cfg(feature = "msos-descriptor")]
-        let mdu = Some(self.inner.msos_descriptor.len());
-
         UsbBufferReport {
             device_descriptor_used: self.inner.device_descriptor.len(),
             config_descriptor_used: self.inner.config_descriptor.len(),
             bos_descriptor_used: self.inner.bos_descriptor.len(),
-            msos_descriptor_used: mdu,
+            msos_descriptor_used: self.inner.msos_descriptor.len(),
             control_buffer_size: self.control_buf.len(),
         }
     }
@@ -684,7 +673,7 @@ impl<'d, D: Driver<'d>> Inner<'d, D> {
                 }
                 _ => InResponse::Rejected,
             },
-            #[cfg(feature = "msos-descriptor")]
+
             (RequestType::Vendor, Recipient::Device) => {
                 if !self.msos_descriptor.is_empty()
                     && req.request == self.msos_descriptor.vendor_code()

embassy-usb/src/msos.rs

@@ -1,5 +1,3 @@
-#![cfg(feature = "msos-descriptor")]
-
 //! Microsoft OS Descriptors
 //!
 //! <https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-os-2-0-descriptors-specification>

examples/nrf52840/Cargo.toml

@@ -34,7 +34,7 @@ embassy-executor = { version = "0.3.1", path = "../../embassy-executor", feature
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime"] }
 embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["defmt", "nrf52840", "time-driver-rtc1", "gpiote", "unstable-pac", "time"] }
 embassy-net = { version = "0.2.0", path = "../../embassy-net", features = ["defmt", "tcp", "dhcpv4", "medium-ethernet"], optional = true }
-embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt", "msos-descriptor",], optional = true }
+embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"], optional = true }
 embedded-io = { version = "0.6.0", features = ["defmt-03"]  }
 embedded-io-async = { version = "0.6.0", optional = true, features = ["defmt-03"] }
 embassy-lora = { version = "0.1.0", path = "../../embassy-lora", features = ["time", "defmt"], optional = true }

examples/rp/src/bin/pio_uart.rs

@@ -75,6 +75,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/rp/src/bin/usb_ethernet.rs

@@ -71,6 +71,7 @@ async fn main(spawner: Spawner) {
         &mut make_static!([0; 256])[..],
         &mut make_static!([0; 256])[..],
         &mut make_static!([0; 256])[..],
+        &mut [], // no msos descriptors
         &mut make_static!([0; 128])[..],
     );
 

examples/rp/src/bin/usb_hid_keyboard.rs

@@ -41,7 +41,7 @@ async fn main(_spawner: Spawner) {
     let mut config_descriptor = [0; 256];
     let mut bos_descriptor = [0; 256];
     // You can also add a Microsoft OS descriptor.
-    // let mut msos_descriptor = [0; 256];
+    let mut msos_descriptor = [0; 256];
     let mut control_buf = [0; 64];
     let request_handler = MyRequestHandler {};
     let mut device_handler = MyDeviceHandler::new();
@@ -54,7 +54,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
-        // &mut msos_descriptor,
+        &mut msos_descriptor,
         &mut control_buf,
     );
 

examples/rp/src/bin/usb_midi.rs

@@ -58,6 +58,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/rp/src/bin/usb_raw.rs

@@ -0,0 +1,199 @@
+//! Example of using USB without a pre-defined class, but instead responding to
+//! raw USB control requests.
+//!
+//! The host computer can either:
+//! * send a command, with a 16-bit request ID, a 16-bit value, and an optional data buffer
+//! * request some data, with a 16-bit request ID, a 16-bit value, and a length of data to receive
+//!
+//! For higher throughput data, you can add some bulk endpoints after creating the alternate,
+//! but for low rate command/response, plain control transfers can be very simple and effective.
+//!
+//! Example code to send/receive data using `nusb`:
+//!
+//! ```ignore
+//! use futures_lite::future::block_on;
+//! use nusb::transfer::{ControlIn, ControlOut, ControlType, Recipient};
+//!
+//! fn main() {
+//!     let di = nusb::list_devices()
+//!         .unwrap()
+//!         .find(|d| d.vendor_id() == 0xc0de && d.product_id() == 0xcafe)
+//!         .expect("no device found");
+//!     let device = di.open().expect("error opening device");
+//!     let interface = device.claim_interface(0).expect("error claiming interface");
+//!
+//!     // Send "hello world" to device
+//!     let result = block_on(interface.control_out(ControlOut {
+//!         control_type: ControlType::Vendor,
+//!         recipient: Recipient::Interface,
+//!         request: 100,
+//!         value: 200,
+//!         index: 0,
+//!         data: b"hello world",
+//!     }));
+//!     println!("{result:?}");
+//!
+//!     // Receive "hello" from device
+//!     let result = block_on(interface.control_in(ControlIn {
+//!         control_type: ControlType::Vendor,
+//!         recipient: Recipient::Interface,
+//!         request: 101,
+//!         value: 201,
+//!         index: 0,
+//!         length: 5,
+//!     }));
+//!     println!("{result:?}");
+//! }
+//! ```
+
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::info;
+use embassy_executor::Spawner;
+use embassy_rp::bind_interrupts;
+use embassy_rp::peripherals::USB;
+use embassy_rp::usb::{Driver, InterruptHandler};
+use embassy_usb::control::{InResponse, OutResponse, Recipient, Request, RequestType};
+use embassy_usb::msos::{self, windows_version};
+use embassy_usb::types::InterfaceNumber;
+use embassy_usb::{Builder, Config, Handler};
+use {defmt_rtt as _, panic_probe as _};
+
+// This is a randomly generated GUID to allow clients on Windows to find our device
+const DEVICE_INTERFACE_GUIDS: &[&str] = &["{AFB9A6FB-30BA-44BC-9232-806CFC875321}"];
+
+bind_interrupts!(struct Irqs {
+    USBCTRL_IRQ => InterruptHandler<USB>;
+});
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    info!("Hello there!");
+
+    let p = embassy_rp::init(Default::default());
+
+    // Create the driver, from the HAL.
+    let driver = Driver::new(p.USB, Irqs);
+
+    // Create embassy-usb Config
+    let mut config = Config::new(0xc0de, 0xcafe);
+    config.manufacturer = Some("Embassy");
+    config.product = Some("USB raw example");
+    config.serial_number = Some("12345678");
+    config.max_power = 100;
+    config.max_packet_size_0 = 64;
+
+    // // Required for windows compatibility.
+    // // https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.9.1/kconfig/CONFIG_CDC_ACM_IAD.html#help
+    config.device_class = 0xEF;
+    config.device_sub_class = 0x02;
+    config.device_protocol = 0x01;
+    config.composite_with_iads = true;
+
+    // Create embassy-usb DeviceBuilder using the driver and config.
+    // It needs some buffers for building the descriptors.
+    let mut device_descriptor = [0; 256];
+    let mut config_descriptor = [0; 256];
+    let mut bos_descriptor = [0; 256];
+    let mut msos_descriptor = [0; 256];
+    let mut control_buf = [0; 64];
+
+    let mut handler = ControlHandler {
+        if_num: InterfaceNumber(0),
+    };
+
+    let mut builder = Builder::new(
+        driver,
+        config,
+        &mut device_descriptor,
+        &mut config_descriptor,
+        &mut bos_descriptor,
+        &mut msos_descriptor,
+        &mut control_buf,
+    );
+
+    // Add the Microsoft OS Descriptor (MSOS/MOD) descriptor.
+    // We tell Windows that this entire device is compatible with the "WINUSB" feature,
+    // which causes it to use the built-in WinUSB driver automatically, which in turn
+    // can be used by libusb/rusb software without needing a custom driver or INF file.
+    // In principle you might want to call msos_feature() just on a specific function,
+    // if your device also has other functions that still use standard class drivers.
+    builder.msos_descriptor(windows_version::WIN8_1, 0);
+    builder.msos_feature(msos::CompatibleIdFeatureDescriptor::new("WINUSB", ""));
+    builder.msos_feature(msos::RegistryPropertyFeatureDescriptor::new(
+        "DeviceInterfaceGUIDs",
+        msos::PropertyData::RegMultiSz(DEVICE_INTERFACE_GUIDS),
+    ));
+
+    // Add a vendor-specific function (class 0xFF), and corresponding interface,
+    // that uses our custom handler.
+    let mut function = builder.function(0xFF, 0, 0);
+    let mut interface = function.interface();
+    let _alt = interface.alt_setting(0xFF, 0, 0, None);
+    handler.if_num = interface.interface_number();
+    drop(function);
+    builder.handler(&mut handler);
+
+    // Build the builder.
+    let mut usb = builder.build();
+
+    // Run the USB device.
+    usb.run().await;
+}
+
+/// Handle CONTROL endpoint requests and responses. For many simple requests and responses
+/// you can get away with only using the control endpoint.
+struct ControlHandler {
+    if_num: InterfaceNumber,
+}
+
+impl Handler for ControlHandler {
+    /// Respond to HostToDevice control messages, where the host sends us a command and
+    /// optionally some data, and we can only acknowledge or reject it.
+    fn control_out<'a>(&'a mut self, req: Request, buf: &'a [u8]) -> Option<OutResponse> {
+        // Log the request before filtering to help with debugging.
+        info!("Got control_out, request={}, buf={:a}", req, buf);
+
+        // Only handle Vendor request types to an Interface.
+        if req.request_type != RequestType::Vendor || req.recipient != Recipient::Interface {
+            return None;
+        }
+
+        // Ignore requests to other interfaces.
+        if req.index != self.if_num.0 as u16 {
+            return None;
+        }
+
+        // Accept request 100, value 200, reject others.
+        if req.request == 100 && req.value == 200 {
+            Some(OutResponse::Accepted)
+        } else {
+            Some(OutResponse::Rejected)
+        }
+    }
+
+    /// Respond to DeviceToHost control messages, where the host requests some data from us.
+    fn control_in<'a>(&'a mut self, req: Request, buf: &'a mut [u8]) -> Option<InResponse<'a>> {
+        info!("Got control_in, request={}", req);
+
+        // Only handle Vendor request types to an Interface.
+        if req.request_type != RequestType::Vendor || req.recipient != Recipient::Interface {
+            return None;
+        }
+
+        // Ignore requests to other interfaces.
+        if req.index != self.if_num.0 as u16 {
+            return None;
+        }
+
+        // Respond "hello" to request 101, value 201, when asked for 5 bytes, otherwise reject.
+        if req.request == 101 && req.value == 201 && req.length == 5 {
+            buf[..5].copy_from_slice(b"hello");
+            Some(InResponse::Accepted(&buf[..5]))
+        } else {
+            Some(InResponse::Rejected)
+        }
+    }
+}

examples/rp/src/bin/usb_raw_bulk.rs

@@ -0,0 +1,142 @@
+//! Example of using USB without a pre-defined class, but instead using raw USB bulk transfers.
+//!
+//! Example code to send/receive data using `nusb`:
+//!
+//! ```ignore
+//! use futures_lite::future::block_on;
+//! use nusb::transfer::RequestBuffer;
+//!
+//! const BULK_OUT_EP: u8 = 0x01;
+//! const BULK_IN_EP: u8 = 0x81;
+//!
+//! fn main() {
+//!     let di = nusb::list_devices()
+//!         .unwrap()
+//!         .find(|d| d.vendor_id() == 0xc0de && d.product_id() == 0xcafe)
+//!         .expect("no device found");
+//!     let device = di.open().expect("error opening device");
+//!     let interface = device.claim_interface(0).expect("error claiming interface");
+//!
+//!     let result = block_on(interface.bulk_out(BULK_OUT_EP, b"hello world".into()));
+//!     println!("{result:?}");
+//!     let result = block_on(interface.bulk_in(BULK_IN_EP, RequestBuffer::new(64)));
+//!     println!("{result:?}");
+//! }
+//! ```
+
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::info;
+use embassy_executor::Spawner;
+use embassy_futures::join::join;
+use embassy_rp::bind_interrupts;
+use embassy_rp::peripherals::USB;
+use embassy_rp::usb::{Driver, InterruptHandler};
+use embassy_usb::driver::{Endpoint, EndpointIn, EndpointOut};
+use embassy_usb::msos::{self, windows_version};
+use embassy_usb::{Builder, Config};
+use {defmt_rtt as _, panic_probe as _};
+
+// This is a randomly generated GUID to allow clients on Windows to find our device
+const DEVICE_INTERFACE_GUIDS: &[&str] = &["{AFB9A6FB-30BA-44BC-9232-806CFC875321}"];
+
+bind_interrupts!(struct Irqs {
+    USBCTRL_IRQ => InterruptHandler<USB>;
+});
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    info!("Hello there!");
+
+    let p = embassy_rp::init(Default::default());
+
+    // Create the driver, from the HAL.
+    let driver = Driver::new(p.USB, Irqs);
+
+    // Create embassy-usb Config
+    let mut config = Config::new(0xc0de, 0xcafe);
+    config.manufacturer = Some("Embassy");
+    config.product = Some("USB raw example");
+    config.serial_number = Some("12345678");
+    config.max_power = 100;
+    config.max_packet_size_0 = 64;
+
+    // // Required for windows compatibility.
+    // // https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.9.1/kconfig/CONFIG_CDC_ACM_IAD.html#help
+    config.device_class = 0xEF;
+    config.device_sub_class = 0x02;
+    config.device_protocol = 0x01;
+    config.composite_with_iads = true;
+
+    // Create embassy-usb DeviceBuilder using the driver and config.
+    // It needs some buffers for building the descriptors.
+    let mut device_descriptor = [0; 256];
+    let mut config_descriptor = [0; 256];
+    let mut bos_descriptor = [0; 256];
+    let mut msos_descriptor = [0; 256];
+    let mut control_buf = [0; 64];
+
+    let mut builder = Builder::new(
+        driver,
+        config,
+        &mut device_descriptor,
+        &mut config_descriptor,
+        &mut bos_descriptor,
+        &mut msos_descriptor,
+        &mut control_buf,
+    );
+
+    // Add the Microsoft OS Descriptor (MSOS/MOD) descriptor.
+    // We tell Windows that this entire device is compatible with the "WINUSB" feature,
+    // which causes it to use the built-in WinUSB driver automatically, which in turn
+    // can be used by libusb/rusb software without needing a custom driver or INF file.
+    // In principle you might want to call msos_feature() just on a specific function,
+    // if your device also has other functions that still use standard class drivers.
+    builder.msos_descriptor(windows_version::WIN8_1, 0);
+    builder.msos_feature(msos::CompatibleIdFeatureDescriptor::new("WINUSB", ""));
+    builder.msos_feature(msos::RegistryPropertyFeatureDescriptor::new(
+        "DeviceInterfaceGUIDs",
+        msos::PropertyData::RegMultiSz(DEVICE_INTERFACE_GUIDS),
+    ));
+
+    // Add a vendor-specific function (class 0xFF), and corresponding interface,
+    // that uses our custom handler.
+    let mut function = builder.function(0xFF, 0, 0);
+    let mut interface = function.interface();
+    let mut alt = interface.alt_setting(0xFF, 0, 0, None);
+    let mut read_ep = alt.endpoint_bulk_out(64);
+    let mut write_ep = alt.endpoint_bulk_in(64);
+    drop(function);
+
+    // Build the builder.
+    let mut usb = builder.build();
+
+    // Run the USB device.
+    let usb_fut = usb.run();
+
+    // Do stuff with the class!
+    let echo_fut = async {
+        loop {
+            read_ep.wait_enabled().await;
+            info!("Connected");
+            loop {
+                let mut data = [0; 64];
+                match read_ep.read(&mut data).await {
+                    Ok(n) => {
+                        info!("Got bulk: {:a}", data[..n]);
+                        // Echo back to the host:
+                        write_ep.write(&data[..n]).await.ok();
+                    }
+                    Err(_) => break,
+                }
+            }
+            info!("Disconnected");
+        }
+    };
+
+    // Run everything concurrently.
+    // If we had made everything `'static` above instead, we could do this using separate tasks instead.
+    join(usb_fut, echo_fut).await;
+}

examples/rp/src/bin/usb_serial.rs

@@ -60,6 +60,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/stm32f1/src/bin/usb_serial.rs

@@ -60,6 +60,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/stm32f3/src/bin/usb_serial.rs

@@ -57,6 +57,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/stm32f4/Cargo.toml

@@ -10,7 +10,7 @@ embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["
 embassy-sync = { version = "0.4.0", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.3.1", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.1.5", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "unstable-traits", "tick-hz-32_768"] }
-embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
+embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt" ] }
 embassy-net = { version = "0.2.0", path = "../../embassy-net", features = ["defmt", "tcp", "dhcpv4", "medium-ethernet", "nightly"] }
 
 defmt = "0.3"

examples/stm32f4/src/bin/usb_ethernet.rs

@@ -94,6 +94,7 @@ async fn main(spawner: Spawner) {
         &mut make_static!([0; 256])[..],
         &mut make_static!([0; 256])[..],
         &mut make_static!([0; 256])[..],
+        &mut [], // no msos descriptors
         &mut make_static!([0; 128])[..],
     );
 

examples/stm32f4/src/bin/usb_raw.rs

@@ -56,10 +56,16 @@ use embassy_stm32::time::Hertz;
 use embassy_stm32::usb_otg::Driver;
 use embassy_stm32::{bind_interrupts, peripherals, usb_otg, Config};
 use embassy_usb::control::{InResponse, OutResponse, Recipient, Request, RequestType};
+use embassy_usb::msos::{self, windows_version};
 use embassy_usb::types::InterfaceNumber;
 use embassy_usb::{Builder, Handler};
 use {defmt_rtt as _, panic_probe as _};
 
+// Randomly generated UUID because Windows requires you provide one to use WinUSB.
+// In principle WinUSB-using software could find this device (or a specific interface
+// on it) by its GUID instead of using the VID/PID, but in practice that seems unhelpful.
+const DEVICE_INTERFACE_GUIDS: &[&str] = &["{DAC2087C-63FA-458D-A55D-827C0762DEC7}"];
+
 bind_interrupts!(struct Irqs {
     OTG_FS => usb_otg::InterruptHandler<peripherals::USB_OTG_FS>;
 });
@@ -114,6 +120,7 @@ async fn main(_spawner: Spawner) {
     let mut device_descriptor = [0; 256];
     let mut config_descriptor = [0; 256];
     let mut bos_descriptor = [0; 256];
+    let mut msos_descriptor = [0; 256];
     let mut control_buf = [0; 64];
 
     let mut handler = ControlHandler {
@@ -126,9 +133,23 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut msos_descriptor,
         &mut control_buf,
     );
 
+    // Add the Microsoft OS Descriptor (MSOS/MOD) descriptor.
+    // We tell Windows that this entire device is compatible with the "WINUSB" feature,
+    // which causes it to use the built-in WinUSB driver automatically, which in turn
+    // can be used by libusb/rusb software without needing a custom driver or INF file.
+    // In principle you might want to call msos_feature() just on a specific function,
+    // if your device also has other functions that still use standard class drivers.
+    builder.msos_descriptor(windows_version::WIN8_1, 0);
+    builder.msos_feature(msos::CompatibleIdFeatureDescriptor::new("WINUSB", ""));
+    builder.msos_feature(msos::RegistryPropertyFeatureDescriptor::new(
+        "DeviceInterfaceGUIDs",
+        msos::PropertyData::RegMultiSz(DEVICE_INTERFACE_GUIDS),
+    ));
+
     // Add a vendor-specific function (class 0xFF), and corresponding interface,
     // that uses our custom handler.
     let mut function = builder.function(0xFF, 0, 0);

examples/stm32f4/src/bin/usb_serial.rs

@@ -77,6 +77,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/stm32f7/src/bin/usb_serial.rs

@@ -77,6 +77,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/stm32g4/src/bin/usb_serial.rs

@@ -75,6 +75,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/stm32h5/src/bin/usb_serial.rs

@@ -82,6 +82,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/stm32h7/src/bin/usb_serial.rs

@@ -78,6 +78,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/stm32l4/src/bin/usb_serial.rs

@@ -72,6 +72,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/stm32l5/src/bin/usb_ethernet.rs

@@ -82,6 +82,7 @@ async fn main(spawner: Spawner) {
         &mut make_static!([0; 256])[..],
         &mut make_static!([0; 256])[..],
         &mut make_static!([0; 256])[..],
+        &mut [], // no msos descriptors
         &mut make_static!([0; 128])[..],
     );
 

examples/stm32l5/src/bin/usb_hid_mouse.rs

@@ -62,6 +62,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/stm32l5/src/bin/usb_serial.rs

@@ -57,6 +57,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );
 

examples/stm32u5/src/bin/usb_serial.rs

@@ -67,6 +67,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [], // no msos descriptors
         &mut control_buf,
     );